How long will you.survive with triple negative breast cancer if untreated?

Don't find out: It is impossible to answer this question without knowing more, particularly what stage the cancer is at. But don't find out. Even triple negative cancer, if caught at an early stage, can be curable. Surgery, radiation and chemotherapy sound terrible and scary but are more tolerable than people think and we have become much better at managing side effects. Talk with women who have been through it.

Probably not long.: Triple negative breast cancer is the most aggressive breast cancer, because it grows and spreads fast and there are fewer options for treatment. If no treatments are given, the cancer will grow and spread and become incurable. Theoretically, if found when very small, you could live for years, but it would not be a good idea to find a small triple negative breast cancer and not treat it.